Light bulb



FIG. 1 is a front, right perspective view of a light bulb showing my new design;

FIG. 2 is a front elevation view of the light bulb;

FIG. 3 is a rear elevation view of the light bulb;

FIG. 4 is a left elevation view of the light bulb;

FIG. 5 is a right elevation view of the light bulb;

FIG. 6 is a top plan view of the light bulb; and,

FIG. 7 is a bottom plan view of the light bulb.

The broken lines in the drawings are for illustrative purposes and represent environmental structure and unclaimed portions of the the light bulb and therefore form no part of the claimed design. 

CLAIM The ornamental design for a light bulb, as shown and described. 